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Lithium battery and positive electrode thereof

A lithium battery and positive electrode technology, applied in the field of lithium battery positive electrode, can solve problems such as loss and battery capacity reduction, and achieve the effect of preventing electrolyte dissolution loss and battery capacity reduction.

Inactive Publication Date: 2013-10-30
原瑞电池科技(深圳)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In long-term use, the negative electrode material or positive electrode material will dissolve in the electrolyte and cause loss, which will reduce the battery capacity

Method used

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  • Lithium battery and positive electrode thereof
  • Lithium battery and positive electrode thereof
  • Lithium battery and positive electrode thereof

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Embodiment Construction

[0015] Such as figure 1 As shown, the positive electrode 10 of the lithium battery of the present invention includes a current collector 101 , a positive electrode active material layer 102 , and a protective film layer 103 . The current collector 101 is a metal substrate or a carbon rod, which has good electrical conductivity. In this embodiment, the material of the current collector 101 is aluminum foil. The positive electrode active material layer 102 is made of composite oxides of lithium and transition metals such as lithium manganese oxide, lithium nickel oxide, lithium cobalt oxide, such as LiCoO 2 , LiMn 2 o 4 、LiFePO 4 、LiNi x co y mn z o 2 (0x co y al z o 2 (00.5 mn 1.5 o 4 , Li 4 Ti 5 o 12 composition. The positive electrode active material layer 102 is coated on the current collector 101 . The material of protective film layer 103 is a metal oxide, such as ZrO 2 , Mg(OH) 2 , MgO, TiO 2 、Al 2 o 3 , La 2 o 3 , ZnO, etc. or a mixture of the abo...

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Abstract

The invention relates to a positive electrode of a lithium battery. The positive electrode comprises a current collector and an positive active material layer coated on the current collector, wherein a protective film layer wraps the positive active material layer so as to prevent the positive active material layer from being dissolved and consumed by electrolyte, so that the volume of the battery is prevented from being reduced. The invention further relates to the lithium battery with the positive electrode.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a lithium battery positive electrode and a lithium battery. Background technique [0002] Lithium batteries have been widely used in consumer electronic products such as mobile phones and notebook computers due to their excellent characteristics such as high energy density, high electromotive force and low self-discharge. [0003] Lithium batteries use carbon materials such as artificial graphite or natural graphite as negative electrode materials, metal oxides such as lithium cobalt, lithium nickel, and lithium manganese as positive electrode materials, and organic solvents or organic polymers as electrolytes. In long-term use, the negative electrode material or positive electrode material will be dissolved in the electrolyte to cause loss, thereby reducing the battery capacity. Contents of the invention [0004] In view of this, it is necessary to provide a lithium battery positive elect...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M10/052
CPCY02E60/122Y02E60/10
Inventor 萧博元邱正中黄建芳
Owner 原瑞电池科技(深圳)有限公司
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